przemol...@poczta.fm wrote:
>On Fri, Jul 07, 2006 at 11:59:29AM +0800, Raymond Xiong wrote:
>
>
>>It doesn't. Page 11 of the following slides illustrates how COW
>>works in ZFS:
>>
>>http://www.opensolaris.org/os/community/zfs/docs/zfs_last.pdf
>>
>>"Blocks containing active data are never over
I think the other part of information that's missing is that we COW at
the block level, NOT at the file level.
So, the extra blocks are in use only during the update, and it's only
blocks, not whole files...
Hope this helps..
Nathan.
On Thu, 2006-07-13 at 14:10, Chad Lewis wrote:
> It uses ext
It uses extra space in the middle of the write, in order to hold the
new data, but once
the write is complete, the space occupied by the old version is now
free for use.
ckl
On Jul 12, 2006, at 8:05 PM, Robert Chen wrote:
I still could not understand why Copy on Write does not waste file
I still could not understand why Copy on Write does not waste file
system capacity.
Robert
Raymond Xiong 写道:
Robert Chen wrote:
question is ZFS uses COW(copy on write), does this mean it will
double usage of capacity or waste the capacity?
What COW really do? No mirror also has
[EMAIL PROTECTED] wrote:
On Fri, Jul 07, 2006 at 11:59:29AM +0800, Raymond Xiong wrote:
It doesn't. Page 11 of the following slides illustrates how COW
works in ZFS:
http://www.opensolaris.org/os/community/zfs/docs/zfs_last.pdf
"Blocks containing active data are never overwritten in place
On Fri, Jul 07, 2006 at 11:59:29AM +0800, Raymond Xiong wrote:
> It doesn't. Page 11 of the following slides illustrates how COW
> works in ZFS:
>
> http://www.opensolaris.org/os/community/zfs/docs/zfs_last.pdf
>
> "Blocks containing active data are never overwritten in place;
> instead, a new bl
Robert Chen wrote:
> question is ZFS uses COW(copy on write), does this mean it will
> double usage of capacity or waste the capacity?
>
> What COW really do? No mirror also has COW?
>
> Please help me, thanks.
>
> Robert
>
> ___
> zfs-discuss mailing lis
question is ZFS uses COW(copy on write), does this mean it will
double usage of capacity or waste the capacity?
What COW really do? No mirror also has COW?
Please help me, thanks.
Robert
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